API Testing · Senior · Question 59 of 75

How do you test API localization, e.g. error messages in several languages?

1Translate the JSON keys and check the API still works
2Localization is UI-only, so APIs don't need such tests
3Send Accept-Language variants and check messages and formats

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Correct answer: Send Accept-Language variants and check messages and formats

Explanation

Messages, number and date formats may depend on the header. Codes should stay stable across languages for clients.

Further reading

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